EFFECTS OF PITZER MIXING PARAMETERS ON THE SOLUBILITY PREDICTION OF HCl-RbCl-H2O SYSTEM AT 25℃

摘要

The calculated solubilities of the phase system HCI-RbCl-H2O at 25℃ when the Pitzer's mixing parameters θ_(HRb) and ψ_(HRbCl) were changed by +10% and -10% were reported. The calculated results indicated that there was a great deviation between the experimental data and the calculated solubilities when the mixing parameters were varied. The influence of ψ_(HRbCl) in solubility prediction in the RbCl-HCl-H2O system is much stronger than that of θ_(HRb). This study supplied a theoretical basis for the manufacturing process which was proposed by Gao and employed to extract LiCl, RbCl and CsCl from salt lake brine.